Noelene Bischoff and her daughter Yvana, 14, died on Saturday, a day after checking into the beachfront resort of Padang Bai in Karangasem, on Bali's east coast. Initial reports suggested they may have eaten toxic fish.

Detective Superintendent Adnan Pandibu, who is leading the investigation, says about 30 prescription and non-prescription medications were found in a toiletries bag in their room.

The Courier-Mail reports the drugs include three anti-allergens, a strip of anti-histamine tablets, paracetamol, eye and ear drops, anti-nausea and stomach drugs, asthma medications, a sedative and an anti-depressant.

"We found many drugs in the room of the victims, about 30," Pandibu said.

"The drugs are currently being examined in the laboratory for forensic identification."

The Bischoffs' bodies will be flown to Australia as soon as the family organises transport to repatriate them, he said.

"We are waiting for the victim's family or the designated authority to take care of it," Pandibu said.

Antar Bangsa Funeral Service, which specialises in repatriating the bodies of foreign nationals who die in Bali, said it had been contacted by Australian authorities about the Bischoffs.

"We are still waiting for confirmation about this operation," spokesman Agus Prababe said.